This contribution is attempting to provide the fundamental basis of a new transmission control protocol designed for the next generation Internet and based on TCP. The TCP protocol is not capable to carry out all the traffic generated by the Internet as it leads to congestion and packet loss out of the quality of service required specially for critical connections that need to be treat with a higher priority. In this paper, we focus on a new protocol design for the next generation Internet. This protocol has been developed in order to avoid or reduce the congestions appearance and the high variability of the Internet traffic. It should be applied preferentially for connections that require a high level of security and performance. We suggest a TCP protocol based on multiple paths MPTCP for a data transmission between two network entities in a well-defined environment. This work is based on a theoretical modeling.